Window insulating panel



FIG. 1: Top right perspective view;

FIG. 2: Bottom left perspective view;

FIG. 3: Top plan view;

FIG. 4: Bottom plan view; and,

FIG. 5: Side edge elevation (all four edges are identical).

The phantomed edges are to indicate that the panel is of indeterminate shape. 

The ornamental design for a window insulating panel, as shown and described. 